Method and apparatus for calendering paper



M. NEWTON.

Method and Apparatus for Calendaring Paper.

Patented July 6, 1880.

NFETWS, FHOTO-LH'HOBRAPHER, WASHINGTON, D 3,

UNITED STATES PATENT OFFICE.

MOSES NEWTON, OF HOLYOKE, MASSACHUSETTS.

METHOD AND APPARATUS FOR CALENDERING PAPER.

SPECIFICATION formingpart of Letters Patent No. 229,551, dated July 6,1880.

Application filed June 4, 1880.

To all whom it may concern:

Be it known that I, MosEs NEWTON, of Holyoke, in the county of Hampdenand State of Massachusetts, have invented certain Improvements inMethods of and Apparatus for Oalendering Paper, of which the followingis a specification.

My invention consists in an improvement in the method of calenderingpaper and in the arrangement of the apparatus for its application.

The invention consists of perforated steampipes or equivalentsteam-conductors so arranged as to deliver steam upon the exterior ofthe usual calender-rolls, in order to effect a moistening of the paperas it passes over and between the surfaces of the rolls, andofwaterconductors communicating with the interior of the hollowcalenderrolls and conveying water thereto and discharging it from thesame or opposite end of one or more of the rolls.

The essential feature of the invention consists in the delivery of steamupon the surfaces of the calender-rolls and in conveying running waterto the interior of the rolls and thence out again, causing thecondensation of the steam upon the surfaces of the rolls, therebyproducin g a polished surface on the paper as it passes over and betweenthe calender-rolls not produced by any other method.

The drawings represent the arrangement which I have ordinarily employed,and" which I consider the best that can be used.

Figure 1 represents a front elevation of an ordinary stack or series ofcalendering-rolls provided with water and steam pipes in accordance withmy plan. Fig. 2 represents a vertical cross-section of the same.

A represents the main frame of the apparatus; B,thecalendering-rolls,arranged horizontally in the frame, as usual; 0, pipes arranged todeliver cold water into a greater or less numberof the calendering-rollsat one end;

(Model) D, pipes which carry offthe water from the opposite end of therolls, and E a steam-pipe having any desired number of perforated armsor branches extending along the outside of the rolls and delivering thesteam thereon. Water may be admitted to all or any desired number of therolls, and the steam may, in like manner, be delivered to a greater orless number of the rolls, as circumstances may require. In most casesthe best results are secured by supplying water to the top rolls onlyand delivering steam upon the bottom rolls only, as represented in thedrawings.

The steam condenses upon the surface of the rolls, dampening themslightly, but with perfect uniformity, and the consequence is that therolls impart to the surface of the paper a much smoother finish andhigher polish than can be attained by the ordinary mode of pro cedure.When the steam and water pipes bear the relation shown in the drawingsthe condensation takes place gradually, but mainly upon the upper rolls,with which the steam comes in contact.

Having thus described my invention, what I claim is-- l. The method ofcalendering paper consisting in subjecting the same to theAaction ofcalendering-surfaces upon which a constant supply of steam is delivered.

2. In combination with a roll for calendering paper a pipe or conductorarranged to deliver steam upon the outer surface of the same.

3. The combination of the calendering-rolls supplied with running waterby pipes communicating with the interior of the rolls and steam-pipesarranged to discharge upon the exterior of the rolls, as described andshown.

MOSES NEWTON.

Witnesses:

AMos ANDREWS, GEo. H. OOLLIN.

